assert "kq->kq_nknotes == NUM" failed in kern_event.c
0 views
Skip to first unread message
syzbot
Jul 22, 2024, 4:08:24 AM (5 days ago) Jul 22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 134de7a21601 Unlock udp(4) somove().
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16d344ad980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=1b35a23cd1d8f7460ee5
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6fe75f612b2a/disk-134de7a2.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/bb40dbf9e29c/bsd-134de7a2.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2ebd0e14f7c4/kernel-134de7a2.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1b35a2...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
368110 49945 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a11e7c0
rbx 0xffff800029b7cd87
rdx 0
rcx 0xffff8000345f6a60
rax 0xffff800029b7bff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x6a94aa55fc5bc984
r11 0x41a0e769379371eb
r12 0xffff800029b7cb88
r13 0
r14 0
r15 0x1
rip 0xffffffff81c6f655 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a11e7b0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=300778 pid=67984 tcnt=0 stat=onproc
flags process=8001008<EXITING,SINGLEEXIT,PIN> proc=2000<WEXIT>
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000345f6a60 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff800034b9aa48,0xffff8000345f6050
process=0xffff800034a97ab0 user=0xffff80002a119000, vmspace=0xfffffd806c4b38b0
estcpu=33, cpticks=2, pctcpu=0.10, user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
95869 292164 84138 0 2 0x8000000 syz-executor
95869 450630 84138 0 3 0xc000080 fsleep syz-executor
29967 151055 63719 0 2 0x8000000 syz-executor
29967 482185 63719 0 3 0xc000080 fsleep syz-executor
87229 72675 18978 0 2 0x8000000 syz-executor
87229 356288 18978 0 3 0xc000080 fsleep syz-executor
87229 430651 18978 0 3 0xc000080 sbwait syz-executor
3979 164570 38208 0 2 0x8000000 syz-executor
3979 472865 38208 0 3 0xc000080 kqpoll syz-executor
3979 132144 38208 0 3 0xc000080 kqpoll syz-executor
3979 454610 38208 0 3 0xc000080 fsleep syz-executor
84693 282391 0 0 3 0x14200 acct acct
84138 36904 70410 0 3 0x8000082 nanoslp syz-executor
18978 206725 70410 0 3 0x8000082 nanoslp syz-executor
38208 397443 70410 0 2 0x8000482 syz-executor
63719 303109 70410 0 3 0x8000082 nanoslp syz-executor
64362 294291 70410 0 2 0x8000002 syz-executor
23379 297528 70410 0 3 0x8000002 biowait syz-executor
87171 56585 70410 0 3 0x8000082 nanoslp syz-executor
72023 403576 1 0 3 0x18100083 ttyin getty
29461 69155 0 0 3 0x14200 bored sosplice
70410 417022 60533 0 2 0x8000002 syz-executor
60533 223886 46879 0 3 0x810008a sigsusp ksh
46879 409605 8298 0 3 0x18000098 kqread sshd-session
8298 344959 47917 0 3 0x18000092 kqread sshd-session
47917 51141 1 0 3 0x18000088 kqread sshd
1405 100774 85402 74 3 0x19100092 bpf pflogd
85402 240475 1 0 3 0x18000080 sbwait pflogd
68006 512812 34494 73 3 0x19100010 ffs_fsync syslogd
34494 276894 1 0 3 0x18100082 sbwait syslogd
94472 512364 1 0 3 0x18100080 kqread resolvd
9579 64396 31237 77 3 0x18100092 kqread dhcpleased
27094 360119 31237 77 3 0x18100092 kqread dhcpleased
31237 241345 1 0 3 0x18000080 kqread dhcpleased
72344 106203 0 0 3 0x14200 bored smr
66013 279951 0 0 2 0x14200 zerothread
62416 491015 0 0 3 0x14200 aiodoned aiodoned
75810 233242 0 0 3 0x14200 syncer update
23139 274874 0 0 3 0x14200 cleaner cleaner
49945 368110 0 0 7 0x14200 reaper
88971 508783 0 0 3 0x14200 pgdaemon pagedaemon
42571 174996 0 0 3 0x14200 bored viomb
75058 187718 0 0 3 0x40014200 acpi0 acpi0
64614 288986 0 0 3 0x40014200 idle1
6007 217926 0 0 3 0x14200 bored softnet3
22968 404934 0 0 3 0x14200 bored softnet2
9575 175131 0 0 3 0x14200 bored softnet1
54737 177140 0 0 2 0x14200 softnet0
64666 78951 0 0 3 0x14200 bored systqmp
92316 325969 0 0 3 0x14200 bored systq
10726 363508 0 0 3 0x14200 tmoslp softclockmp
26588 310540 0 0 3 0x40014200 tmoslp softclock
66248 82802 0 0 3 0x40014200 idle0
1 451349 0 0 3 0x8080082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800812a3f8)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_remove_ptes+0x297 sys/arch/amd64/amd64/pmap.c:1702
#4 pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909
#5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883
#6 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520
#7 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#8 reaper+0x25b sys/kern/kern_exit.c:480
#9 proc_trampoline+0x10
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a014308)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline]
#3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1813
#4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883
#5 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520
#6 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#7 reaper+0x25b sys/kern/kern_exit.c:480
#8 proc_trampoline+0x10
Process 23379 (syz-executor) thread 0xffff8000345f4cf8 (297528)
exclusive rrwlock inode r = 0 (0xfffffd80779da818)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 vget+0x2bd sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201
#8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#11 namei+0x7aa sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80779dad68)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 vget+0x2bd sys/kern/vfs_subr.c:676
#6 cache_lookup+0x36e sys/kern/vfs_cache.c:222
#7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160
#8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#10 namei+0x7aa sys/kern/vfs_lookup.c:250
#11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#13 Xsyscall+0x128
Process 68006 (syslogd) thread 0xffff8000ffffdbe8 (512812)
exclusive rrwlock inode r = 0 (0xfffffd806e4b11b0)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927
#6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
Process 49945 (reaper) thread 0xffff800029fd9448 (368110)
exclusive rwlock vmmaplk r = 0 (0xfffffd8077361b50)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5277
#3 uvm_map_teardown+0x104 sys/uvm/uvm_map.c:2488
#4 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#5 reaper+0x25b sys/kern/kern_exit.c:480
#6 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10250 10261K 10775K 166960K 18192 0
pcb 17 17K 19K 166960K 697 0
rtable 213 16K 18K 166960K 5764 0
pf 42 19K 23K 166960K 650 0
ifaddr 41 8K 9K 166960K 772 0
ifgroup 64 2K 3K 166960K 850 0
sysctl 3 0K 1K 166960K 9 0
counters 68 36K 37K 166960K 488 0
ioctlops 0 0K 8K 166960K 2208 0
iov 1 2K 25K 166960K 408 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1644 103K 104K 166960K 7814 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 81 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 358 0
dirhash 15 2K 3K 166960K 129 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 14 49K 89K 166960K 5692 0
sigio 0 0K 0K 166960K 79 0
proc 70 91K 128K 166960K 5444 0
subproc 91 5K 7K 166960K 2262 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 786 0
in_multi 79 5K 7K 166960K 2009 0
ether_multi 1 0K 0K 166960K 16 0
mrt 1 0K 0K 166960K 7 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 313 1394K 1394K 166960K 313 0
exec 0 0K 1K 166960K 3258 0
pfkey data 0 0K 0K 166960K 5 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 231 85K 115K 166960K 46259 0
UVM aobj 115 8K 8K 166960K 120 0
pinsyscall 39 78K 101K 166960K 11089 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 168 0
NDP 14 0K 2K 166960K 572 0
temp 77 6816K 6944K 166960K 221141 0
kqueue 16 22K 30K 166960K 534 0
SYN cache 2 8K 16K 166960K 3 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 783 0 780 4 3 1 3 0 8 0
rtentry 112 2055 0 1966 6 3 3 4 0 8 0
unpcb 144 4790 0 4636 50 44 6 6 0 8 0
syncache 336 9 0 9 6 6 0 1 0 8 0
tcpcb 808 1912 0 1904 80 75 5 14 0 8 4
arp 120 366 0 351 1 0 1 1 0 8 0
ipq 40 2 0 2 2 2 0 1 0 8 0
ipqe 40 6 0 6 2 2 0 1 0 8 0
inpcb 336 6449 0 6435 92 85 7 14 0 8 5
nd6 136 571 0 549 3 2 1 2 0 8 0
pkpcb 40 20 0 20 9 8 1 1 0 8 1
kcovpl 48 174 0 167 1 0 1 1 0 8 0
ppxss 1168 34 0 34 10 10 0 1 0 8 0
pfstscr 40 1 0 0 1 0 1 1 0 8 0
pffrag 232 39 0 34 2 1 1 1 0 482 0
pffrnode 88 39 0 34 2 1 1 1 0 8 0
pffrent 40 234 0 229 2 1 1 1 0 8 0
pfosfp 40 1439 0 1435 5 4 1 5 0 8 0
pfosfpen 112 1439 0 1430 21 20 1 21 0 8 0
pfrktable 1344 31 0 27 5 4 1 1 0 8 0
pfanchor 1288 9 0 7 4 3 1 1 0 8 0
pftag 88 14 0 13 4 3 1 1 0 8 0
pfqueue 264 2 0 1 2 1 1 1 0 8 0
pfstitem 24 364 0 337 1 0 1 1 0 8 0
pfstkey 128 367 0 339 2 0 2 2 0 8 0
pfstate 376 363 0 337 9 5 4 5 0 8 0
pfrule 1344 72 0 64 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 8091 0 7705 53 25 28 30 0 8 0
art_table 32 8092 0 7705 5 1 4 4 0 8 0
art_node 16 2043 0 1965 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0
semapl 112 355 0 345 1 0 1 1 0 8 0
shmpl 112 117 0 5 4 0 4 4 0 8 0
dirhash 1024 98 0 78 4 1 3 4 0 8 0
dino2pl 256 8605 0 6766 117 1 116 116 0 8 0
ffsino 272 8605 0 6766 124 0 124 124 0 8 0
nchpl 144 13841 0 11927 73 1 72 72 0 8 0
uvmvnodes 80 8741 0 0 179 0 179 179 0 8 0
vnodes 216 8741 0 0 486 0 486 486 0 8 0
namei 1024 71879 0 71879 12 11 1 2 0 8 1
percpumem 16 258 0 210 1 0 1 1 0 8 0
vcpupl 3904 6 0 2 1 0 1 1 0 8 0
vmpool 696 19 0 15 1 0 1 1 0 8 0
pfiaddrpl 120 9 0 7 4 3 1 1 0 8 0
kstatmem 264 448 0 420 6 3 3 3 0 8 0
scsiplug 72 10 0 10 8 7 1 1 0 8 1
scxspl 216 113672 0 113670 20 19 1 8 1 8 0
plimitpl 152 1828 0 1811 1 0 1 1 0 8 0
sigapl 424 5684 0 5635 13 6 7 9 0 8 1
futexpl 64 69256 0 69252 16 15 1 1 0 8 0
knotepl 120 735 0 0 18 0 18 18 0 8 0
kqueuepl 216 1828 0 1815 31 29 2 8 0 8 0
pipepl 320 1287 0 1260 17 13 4 8 0 8 1
fdescpl 496 5643 0 5615 7 2 5 5 0 8 0
filepl 152 43763 0 43397 98 83 15 23 0 8 0
lockfpl 104 1814 0 1812 3 2 1 2 0 8 0
lockfspl 48 663 0 661 1 0 1 1 0 8 0
sessionpl 144 191 0 182 1 0 1 1 0 8 0
pgrppl 48 422 0 405 1 0 1 1 0 8 0
ucredpl 104 7343 0 7330 1 0 1 1 0 8 0
zombiepl 144 5637 0 5635 2 1 1 1 0 8 0
processpl 1152 5684 0 5635 7 3 4 6 0 8 0
procpl 648 11574 0 11515 12 5 7 9 0 8 1
srpgc 96 33 0 33 12 11 1 1 0 8 1
sosppl 168 20 0 20 10 9 1 1 0 8 1
sockpl 664 12193 0 12022 153 138 15 20 0 8 0
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 13 0 0 2 0 2 2 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 351 0 0 29 1 28 29 0 8 0
mtagpl 96 95 0 0 2 0 2 2 0 8 0
mbufpl 256 765 0 0 38 0 38 38 0 8 0
bufpl 280 17851 0 9110 625 0 625 625 0 8 0
anonpl 24 740753 0 732200 152 69 83 83 0 185 4
amapchunkpl 152 146658 0 146128 77 41 36 37 0 158 11
amappl16 200 12277 0 12026 116 89 27 27 0 8 0
amappl15 192 13 0 13 1 1 0 1 0 8 0
amappl14 184 452 0 440 1 0 1 1 0 8 0
amappl13 176 12 0 12 2 2 0 1 0 8 0
amappl12 168 8920 0 8892 4 2 2 3 0 8 0
amappl11 160 74 0 60 1 0 1 1 0 8 0
amappl10 152 12 0 12 1 1 0 1 0 8 0
amappl9 144 132 0 132 1 1 0 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 444 0 431 1 0 1 1 0 8 0
amappl6 120 1821 0 1819 1 0 1 1 0 8 0
amappl5 112 812 0 799 1 0 1 1 0 8 0
amappl4 104 855 0 834 1 0 1 1 0 8 0
amappl3 96 28969 0 28865 5 1 4 4 0 8 0
amappl2 88 2960 0 2892 2 0 2 2 0 8 0
amappl1 80 34498 0 33929 15 1 14 14 0 8 0
amappl 88 44441 0 44276 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 119 0 5 3 0 3 3 0 8 0
uaddrrnd 24 5662 0 5630 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5662 0 5630 1 0 1 1 0 8 0
vmmpekpl 168 49001 0 48942 4 0 4 4 0 8 0
vmmpepl 168 354662 0 352642 170 67 103 107 0 357 0
vmsppl 440 5661 0 5629 7 2 5 5 0 8 0
rwobjpl 56 100946 0 90931 154 11 143 143 0 8 1
pdppl 4096 11331 0 11262 328 252 76 85 0 8 7
pvpl 32 34680 0 0 276 1 275 275 0 265 0
pmappl 248 5661 0 5629 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 903 0 470 14 1 13 13 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371
uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540
uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480
end trace frame: 0x0, count: 6
ddb{0}> trace
x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371
uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540
uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480
end trace frame: 0x0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: 3
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: -12
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 134de7a21601 Unlock udp(4) somove().
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16d344ad980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=1b35a23cd1d8f7460ee5
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6fe75f612b2a/disk-134de7a2.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/bb40dbf9e29c/bsd-134de7a2.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2ebd0e14f7c4/kernel-134de7a2.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1b35a2...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
368110 49945 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a11e7c0
rbx 0xffff800029b7cd87
rdx 0
rcx 0xffff8000345f6a60
rax 0xffff800029b7bff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x6a94aa55fc5bc984
r11 0x41a0e769379371eb
r12 0xffff800029b7cb88
r13 0
r14 0
r15 0x1
rip 0xffffffff81c6f655 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a11e7b0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=300778 pid=67984 tcnt=0 stat=onproc
flags process=8001008<EXITING,SINGLEEXIT,PIN> proc=2000<WEXIT>
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000345f6a60 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff800034b9aa48,0xffff8000345f6050
process=0xffff800034a97ab0 user=0xffff80002a119000, vmspace=0xfffffd806c4b38b0
estcpu=33, cpticks=2, pctcpu=0.10, user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
95869 292164 84138 0 2 0x8000000 syz-executor
95869 450630 84138 0 3 0xc000080 fsleep syz-executor
29967 151055 63719 0 2 0x8000000 syz-executor
29967 482185 63719 0 3 0xc000080 fsleep syz-executor
87229 72675 18978 0 2 0x8000000 syz-executor
87229 356288 18978 0 3 0xc000080 fsleep syz-executor
87229 430651 18978 0 3 0xc000080 sbwait syz-executor
3979 164570 38208 0 2 0x8000000 syz-executor
3979 472865 38208 0 3 0xc000080 kqpoll syz-executor
3979 132144 38208 0 3 0xc000080 kqpoll syz-executor
3979 454610 38208 0 3 0xc000080 fsleep syz-executor
84693 282391 0 0 3 0x14200 acct acct
84138 36904 70410 0 3 0x8000082 nanoslp syz-executor
18978 206725 70410 0 3 0x8000082 nanoslp syz-executor
38208 397443 70410 0 2 0x8000482 syz-executor
63719 303109 70410 0 3 0x8000082 nanoslp syz-executor
64362 294291 70410 0 2 0x8000002 syz-executor
23379 297528 70410 0 3 0x8000002 biowait syz-executor
87171 56585 70410 0 3 0x8000082 nanoslp syz-executor
72023 403576 1 0 3 0x18100083 ttyin getty
29461 69155 0 0 3 0x14200 bored sosplice
70410 417022 60533 0 2 0x8000002 syz-executor
60533 223886 46879 0 3 0x810008a sigsusp ksh
46879 409605 8298 0 3 0x18000098 kqread sshd-session
8298 344959 47917 0 3 0x18000092 kqread sshd-session
47917 51141 1 0 3 0x18000088 kqread sshd
1405 100774 85402 74 3 0x19100092 bpf pflogd
85402 240475 1 0 3 0x18000080 sbwait pflogd
68006 512812 34494 73 3 0x19100010 ffs_fsync syslogd
34494 276894 1 0 3 0x18100082 sbwait syslogd
94472 512364 1 0 3 0x18100080 kqread resolvd
9579 64396 31237 77 3 0x18100092 kqread dhcpleased
27094 360119 31237 77 3 0x18100092 kqread dhcpleased
31237 241345 1 0 3 0x18000080 kqread dhcpleased
72344 106203 0 0 3 0x14200 bored smr
66013 279951 0 0 2 0x14200 zerothread
62416 491015 0 0 3 0x14200 aiodoned aiodoned
75810 233242 0 0 3 0x14200 syncer update
23139 274874 0 0 3 0x14200 cleaner cleaner
49945 368110 0 0 7 0x14200 reaper
88971 508783 0 0 3 0x14200 pgdaemon pagedaemon
42571 174996 0 0 3 0x14200 bored viomb
75058 187718 0 0 3 0x40014200 acpi0 acpi0
64614 288986 0 0 3 0x40014200 idle1
6007 217926 0 0 3 0x14200 bored softnet3
22968 404934 0 0 3 0x14200 bored softnet2
9575 175131 0 0 3 0x14200 bored softnet1
54737 177140 0 0 2 0x14200 softnet0
64666 78951 0 0 3 0x14200 bored systqmp
92316 325969 0 0 3 0x14200 bored systq
10726 363508 0 0 3 0x14200 tmoslp softclockmp
26588 310540 0 0 3 0x40014200 tmoslp softclock
66248 82802 0 0 3 0x40014200 idle0
1 451349 0 0 3 0x8080082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800812a3f8)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_remove_ptes+0x297 sys/arch/amd64/amd64/pmap.c:1702
#4 pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909
#5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883
#6 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520
#7 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#8 reaper+0x25b sys/kern/kern_exit.c:480
#9 proc_trampoline+0x10
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a014308)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline]
#3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1813
#4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883
#5 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520
#6 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#7 reaper+0x25b sys/kern/kern_exit.c:480
#8 proc_trampoline+0x10
Process 23379 (syz-executor) thread 0xffff8000345f4cf8 (297528)
exclusive rrwlock inode r = 0 (0xfffffd80779da818)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 vget+0x2bd sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201
#8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#11 namei+0x7aa sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80779dad68)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 vget+0x2bd sys/kern/vfs_subr.c:676
#6 cache_lookup+0x36e sys/kern/vfs_cache.c:222
#7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160
#8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#10 namei+0x7aa sys/kern/vfs_lookup.c:250
#11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#13 Xsyscall+0x128
Process 68006 (syslogd) thread 0xffff8000ffffdbe8 (512812)
exclusive rrwlock inode r = 0 (0xfffffd806e4b11b0)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927
#6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
Process 49945 (reaper) thread 0xffff800029fd9448 (368110)
exclusive rwlock vmmaplk r = 0 (0xfffffd8077361b50)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5277
#3 uvm_map_teardown+0x104 sys/uvm/uvm_map.c:2488
#4 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
#5 reaper+0x25b sys/kern/kern_exit.c:480
#6 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10250 10261K 10775K 166960K 18192 0
pcb 17 17K 19K 166960K 697 0
rtable 213 16K 18K 166960K 5764 0
pf 42 19K 23K 166960K 650 0
ifaddr 41 8K 9K 166960K 772 0
ifgroup 64 2K 3K 166960K 850 0
sysctl 3 0K 1K 166960K 9 0
counters 68 36K 37K 166960K 488 0
ioctlops 0 0K 8K 166960K 2208 0
iov 1 2K 25K 166960K 408 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1644 103K 104K 166960K 7814 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 81 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 358 0
dirhash 15 2K 3K 166960K 129 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 14 49K 89K 166960K 5692 0
sigio 0 0K 0K 166960K 79 0
proc 70 91K 128K 166960K 5444 0
subproc 91 5K 7K 166960K 2262 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 786 0
in_multi 79 5K 7K 166960K 2009 0
ether_multi 1 0K 0K 166960K 16 0
mrt 1 0K 0K 166960K 7 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 313 1394K 1394K 166960K 313 0
exec 0 0K 1K 166960K 3258 0
pfkey data 0 0K 0K 166960K 5 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 231 85K 115K 166960K 46259 0
UVM aobj 115 8K 8K 166960K 120 0
pinsyscall 39 78K 101K 166960K 11089 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 168 0
NDP 14 0K 2K 166960K 572 0
temp 77 6816K 6944K 166960K 221141 0
kqueue 16 22K 30K 166960K 534 0
SYN cache 2 8K 16K 166960K 3 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 783 0 780 4 3 1 3 0 8 0
rtentry 112 2055 0 1966 6 3 3 4 0 8 0
unpcb 144 4790 0 4636 50 44 6 6 0 8 0
syncache 336 9 0 9 6 6 0 1 0 8 0
tcpcb 808 1912 0 1904 80 75 5 14 0 8 4
arp 120 366 0 351 1 0 1 1 0 8 0
ipq 40 2 0 2 2 2 0 1 0 8 0
ipqe 40 6 0 6 2 2 0 1 0 8 0
inpcb 336 6449 0 6435 92 85 7 14 0 8 5
nd6 136 571 0 549 3 2 1 2 0 8 0
pkpcb 40 20 0 20 9 8 1 1 0 8 1
kcovpl 48 174 0 167 1 0 1 1 0 8 0
ppxss 1168 34 0 34 10 10 0 1 0 8 0
pfstscr 40 1 0 0 1 0 1 1 0 8 0
pffrag 232 39 0 34 2 1 1 1 0 482 0
pffrnode 88 39 0 34 2 1 1 1 0 8 0
pffrent 40 234 0 229 2 1 1 1 0 8 0
pfosfp 40 1439 0 1435 5 4 1 5 0 8 0
pfosfpen 112 1439 0 1430 21 20 1 21 0 8 0
pfrktable 1344 31 0 27 5 4 1 1 0 8 0
pfanchor 1288 9 0 7 4 3 1 1 0 8 0
pftag 88 14 0 13 4 3 1 1 0 8 0
pfqueue 264 2 0 1 2 1 1 1 0 8 0
pfstitem 24 364 0 337 1 0 1 1 0 8 0
pfstkey 128 367 0 339 2 0 2 2 0 8 0
pfstate 376 363 0 337 9 5 4 5 0 8 0
pfrule 1344 72 0 64 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 8091 0 7705 53 25 28 30 0 8 0
art_table 32 8092 0 7705 5 1 4 4 0 8 0
art_node 16 2043 0 1965 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0
semapl 112 355 0 345 1 0 1 1 0 8 0
shmpl 112 117 0 5 4 0 4 4 0 8 0
dirhash 1024 98 0 78 4 1 3 4 0 8 0
dino2pl 256 8605 0 6766 117 1 116 116 0 8 0
ffsino 272 8605 0 6766 124 0 124 124 0 8 0
nchpl 144 13841 0 11927 73 1 72 72 0 8 0
uvmvnodes 80 8741 0 0 179 0 179 179 0 8 0
vnodes 216 8741 0 0 486 0 486 486 0 8 0
namei 1024 71879 0 71879 12 11 1 2 0 8 1
percpumem 16 258 0 210 1 0 1 1 0 8 0
vcpupl 3904 6 0 2 1 0 1 1 0 8 0
vmpool 696 19 0 15 1 0 1 1 0 8 0
pfiaddrpl 120 9 0 7 4 3 1 1 0 8 0
kstatmem 264 448 0 420 6 3 3 3 0 8 0
scsiplug 72 10 0 10 8 7 1 1 0 8 1
scxspl 216 113672 0 113670 20 19 1 8 1 8 0
plimitpl 152 1828 0 1811 1 0 1 1 0 8 0
sigapl 424 5684 0 5635 13 6 7 9 0 8 1
futexpl 64 69256 0 69252 16 15 1 1 0 8 0
knotepl 120 735 0 0 18 0 18 18 0 8 0
kqueuepl 216 1828 0 1815 31 29 2 8 0 8 0
pipepl 320 1287 0 1260 17 13 4 8 0 8 1
fdescpl 496 5643 0 5615 7 2 5 5 0 8 0
filepl 152 43763 0 43397 98 83 15 23 0 8 0
lockfpl 104 1814 0 1812 3 2 1 2 0 8 0
lockfspl 48 663 0 661 1 0 1 1 0 8 0
sessionpl 144 191 0 182 1 0 1 1 0 8 0
pgrppl 48 422 0 405 1 0 1 1 0 8 0
ucredpl 104 7343 0 7330 1 0 1 1 0 8 0
zombiepl 144 5637 0 5635 2 1 1 1 0 8 0
processpl 1152 5684 0 5635 7 3 4 6 0 8 0
procpl 648 11574 0 11515 12 5 7 9 0 8 1
srpgc 96 33 0 33 12 11 1 1 0 8 1
sosppl 168 20 0 20 10 9 1 1 0 8 1
sockpl 664 12193 0 12022 153 138 15 20 0 8 0
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 13 0 0 2 0 2 2 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 351 0 0 29 1 28 29 0 8 0
mtagpl 96 95 0 0 2 0 2 2 0 8 0
mbufpl 256 765 0 0 38 0 38 38 0 8 0
bufpl 280 17851 0 9110 625 0 625 625 0 8 0
anonpl 24 740753 0 732200 152 69 83 83 0 185 4
amapchunkpl 152 146658 0 146128 77 41 36 37 0 158 11
amappl16 200 12277 0 12026 116 89 27 27 0 8 0
amappl15 192 13 0 13 1 1 0 1 0 8 0
amappl14 184 452 0 440 1 0 1 1 0 8 0
amappl13 176 12 0 12 2 2 0 1 0 8 0
amappl12 168 8920 0 8892 4 2 2 3 0 8 0
amappl11 160 74 0 60 1 0 1 1 0 8 0
amappl10 152 12 0 12 1 1 0 1 0 8 0
amappl9 144 132 0 132 1 1 0 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 444 0 431 1 0 1 1 0 8 0
amappl6 120 1821 0 1819 1 0 1 1 0 8 0
amappl5 112 812 0 799 1 0 1 1 0 8 0
amappl4 104 855 0 834 1 0 1 1 0 8 0
amappl3 96 28969 0 28865 5 1 4 4 0 8 0
amappl2 88 2960 0 2892 2 0 2 2 0 8 0
amappl1 80 34498 0 33929 15 1 14 14 0 8 0
amappl 88 44441 0 44276 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 119 0 5 3 0 3 3 0 8 0
uaddrrnd 24 5662 0 5630 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5662 0 5630 1 0 1 1 0 8 0
vmmpekpl 168 49001 0 48942 4 0 4 4 0 8 0
vmmpepl 168 354662 0 352642 170 67 103 107 0 357 0
vmsppl 440 5661 0 5629 7 2 5 5 0 8 0
rwobjpl 56 100946 0 90931 154 11 143 143 0 8 1
pdppl 4096 11331 0 11262 328 252 76 85 0 8 7
pvpl 32 34680 0 0 276 1 275 275 0 265 0
pmappl 248 5661 0 5629 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 903 0 470 14 1 13 13 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371
uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540
uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480
end trace frame: 0x0, count: 6
ddb{0}> trace
x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371
uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540
uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480
end trace frame: 0x0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: 3
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29
KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline]
KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219
kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669
fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a
syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74f12697cd10, count: -12
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Reply all
Reply to author
Forward
0 new messages